Investigators are zeroing in on the driver after a Greyhound bus headed from Cincinnati to Detroit flipped on September 14, sending 35 victims to the hospital. Preliminary reports state that some sortMore >>

Preliminary reports state that some sort of medical condition led to the crash. Investigation revealed that the driver of the bus, 64-year-old Dwayne Garrett, was drinking coffee, started coughing and passed out.More >>

A Greyhound bus overturns, injuring 34 people. A little after 4 a.m. on Saturday, September 14, 2013, both the Butler County and Warren County Communication Centers were notified of a bus accident northboundMore >>

Seven people are still hospitalized after a Greyhound bus headed from Cincinnati to Detroit flipped early Saturday morning.More >>

Troopers say Garrett was drinking coffee while driving and began to cough.

The bus ran off the side of the road, crashing into a fence and a tree before coming to rest on its side.

In the report, witnesses describe panic during and after the crash and people trying to get out through the back hatch with injuries ranging from bruises to broken bones. Many of the passengers reported that they were asleep when the bus crashed.

One of the witnesses reports, "I thought the driver was just changing lanes. The bus continued to move to the right, driving over the rumble strips and kept going off the right side of the road. He did not brake at all. Before we were completely off of the interstate I started yelling at the driver but he did not respond to me."

Garret told troopers that he doesn't remember anything for about a mile before the bus crashed. Troopers believe Garrett suffered a medical episode but they did not detail what that might be.

Troopers say Garrett regained consciousness when the bus was on its side.

When officers arrived on the scene, all the passengers were out of the bus but Garrett was still stuck inside. He had to be cut out.

After the crash, 35 patients were transported to local hospitals; twenty-eight via ground and six via air.

Troopers don't expect that drugs or alcohol to be a factor but the results of Garrett's blood tests are still pending. If convicted on the charge of operating a vehicle without reasonable control, Garrett could face a suspended license and a fine of less than $100.